CN105308894A

CN105308894A - Data transmission method and emission device

Info

Publication number: CN105308894A
Application number: CN201480000392.XA
Authority: CN
Inventors: 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Guangdong Gaohang Intellectual Property Operation Co ltd; Nanjing Cloud Limulus Intelligent Big Data Co ltd
Priority date: 2014-02-20
Filing date: 2014-02-20
Publication date: 2016-02-03
Anticipated expiration: 2034-02-20
Also published as: WO2015123838A1; CN105308894B

Abstract

Disclosed are a data transmission method and an emission device. The device comprises: a coding and modulation unit for obtaining information bits and performing channel coding and modulation on the information bits to obtain modulated data; a mapping unit for mapping the data modulated by the coding and modulation unit onto v spatial data layers transmitted in parallel, wherein v is larger than or equal to 1; a vector selection unit for selecting v columns of pre-coding vectors Wv from a local codebook W so that more than half of the energy of a directivity diagram formed by the v columns of pre-coding vectors Wv selected from W appears within a non-isotropic angle range; a pre-coding unit for using the v columns of pre-coding vectors, selected by the vector selection unit, to respectively pre-code the modulated data mapped onto the v layers; and a modulation unit for modulating the data obtained after pre-coding by the pre-coding unit, and transmitting the modulated data through v antennae. The energy of the emission device described above can be focused at a specified angle, which therefore improves the receiving SNR (Signal-to-Noise Ratio) of UE (User Equipment).

Description

Data transmission method and emission device

A kind of data transmission method, and emitter

Technical field

It is related to a kind of data transmission method, and emitter the present invention relates to communication technical field , Te Do.Background technology

Multiple antennas MIMO (Multiple Input Multiple Output, multiple-input, multiple-output）Technology is the core technology in the new generation of wireless communication technology.Work as emitter（Such as eNB (evolved Node B, evolved base station））When side is provided with multiple antennas, multiplexing scheme can be both used, diversity scheme can also be used.Diversity scheme can provide higher reception SINR (Signal to Interference plus Noise Ratio, signal to noise ratio）, so that more remote covering is reached, or higher transmission rate during same distance covering.Diversity scheme is not due to needing UE (User Equipment, user equipment) side to provide CSI (Channel State Information channel condition informations）Measurement feedback, thus with stronger link robustness.Therefore, using MIMO technology wireless communication system in, system design when can regard diversity transmission schemes as a kind of essential multiple antennas delivery plan.

So-called diversity transmission, exactly when there is M antenna, just does diversity transmission in M resource, so as to reach the multi-antenna transmission effect that the spatial reuse factor is 1.So-called resource, if temporal multiple resources, then diversity scheme is commonly referred to as STBC (Space Time Block Code, Space-Time Block Coding）；When the resource used is frequency domain resource, then diversity scheme is commonly referred to as SFBC (Space Frequency Block Code, space-time/frequency block code）.Also a kind of CDD (Cyclic Delay Diversity, cyclic delay diversity）Method, that is, the signal that will be mapped on each antenna does after the cyclic shift of certain sampling point and to be sent from each different antenna.However, which kind of method, it is substantially still the multi-antenna sending method of diversity.

In LTE Rel-8 (Long Term Evolution Rel-8, the version of Long Term Evolution the 8th）In version, the big delay CDD of introducing spatial multiplex scheme is as follows：

In above formula, W is the V sheaf space data sent on i-th of running time-frequency resource, a shared V Sheaf space data.Matrix U is a length of V DFT (Discrete Fourier Transform, discrete Fourier transform）Square formation, matrix D is a length of V diagonal matrix, and above-mentioned W is a pre-coding matrix being transformed into V layer datas on antenna, all directions of its each component pointing space.Above CDD scheme define only application method at most 4 layers；Also, only resulted in when antenna number is 2 close to optimal performance, when antenna number is 4 and bigger antenna number, performance is not optimal, still there are 4 blunt big optimization spaces.In addition, above scheme can not be used for multiplex（Diversity）Scene.In order to solve the above problems, it is proposed that another solution：The signal that will be sent is divided into L, and (L is positive integer）Individual running time-frequency resource, then, sends a wave beam on each running time-frequency resource, wave vector then will be sent between adjacent wave beam is rotated.Above scheme, can cover 360 in L running time-frequency resource.All wave beams scope, cause the power dissipation of emitter, so as to cause UE received signal to noise ratio (Signal to Noise Ratio, SNR) relatively low.The content of the invention

The embodiments of the invention provide a kind of data transmission method, and emitter, for realizing the control to wave beam, energy is focused in the angle specified, so that improving UE receives SNR.

On the one hand the embodiment of the present invention provides a kind of data sending device, it is characterised in that including：Coded modulation unit, Channel Coding and Modulation, the data after being modulated are carried out for obtaining information bit, and to described information bit；

Map unit, the V spatial data layer for the data after coded modulation unit modulation to be mapped to transmitted in parallel, V is more than or equal to 1;

Vector storage unit, for selecting V row precoding vectors W from local code book W_vSo that more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from the W are appeared in the angular range of non-omnidirectional；

Precoding unit, the V row precoding vector point Do for being selected using the vector storage unit carries out precoding to being mapped to the data after the modulation of V layer；

Modulating unit, for being modulated in the data obtained to the precoding unit precoding, and the data that adjustment is obtained are sent by V antenna.

With reference to the implementation of one side, in the first possible implementation, the method that the vector storage unit selects V row precoding vectors ^ from local code book W, including：It is all in the W Alternate selection obtains V row in row；Or, select the corresponding row of maximum wave beam first in the W, remaining V -1 is listed in alternate selection in the remaining columns after being selected first in the W；Or, the row to be selected in the W are determined according to specified angle of coverage, then alternate selection obtains V row, or the corresponding row of the maximum wave beam of selection first in row to be selected in row to be selected, and remaining V -1 is listed in alternate selection in the remaining row to be selected after being selected first in the W.

With reference to the implementation of one side, in second of possible implementation, described device, in addition to：Sign reversing unit, during V spatial data layer for the data after modulation to be mapped to transmitted in parallel in the map unit, layer mapping is done to i-th of data symbol d (i), the d (i) is reflected then, carry out sign change, it is described that (0 refers to i-th of data symbol in the Z data flow after layer mapping, meets following condition：

x^(l)( ) = d(vi + (/ + ) mod ν),0 < / <ν -1 combines second of possible implementation of the implementation of one side or the first possible implementation or one side of one side, and in the third possible implementation, the vector storage unit is used

；The value of calculating [

+ Δ_{θ ]}In the range of and value exist ,+] and in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, ^ and ^ are that emitter is that antenna needs the angular range of covering on the direction of angle and place plane in angle He Fen Do of two institute's coverage directions, V is the columns for being derived from pre-coding matrix, the w is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) and represent that the 1st row get V row from local code book,^dFen Do for pair and ^ quadrature.

With reference to one side implementation or one side the first possible implementation or one side second of possible implementation, in the 4th kind of possible implementation, the acquisition pattern for the local code book W that the vector storage unit is used includes：With equation below：

Calculate in the span of the w in f (W)=msix { G (W) } find out satisfaction cause in two-dimensional space V precoding vector so that directional diagram value [.In the range of ,+], and average gain vector in the range of the two dimension angular in space reaches prelisting during maximum

_{= 6}]2πάλ-¹ (^\)-ύη(θ) ₌

Code matrix；Wherein,_aFor " J⁼E, /=' Nv --- Shang, N be emitter transmitting antenna number；^ and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle ^, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book,^W) for the average gain vector of directional diagram, a is the guiding vector of emitter each antenna, W (：, 1) and represent that the 1st row get V row from local code book, d is the position vector of each corresponding bay of emitter of two-dimensional space.

With reference to one side implementation or one side the first possible implementation or one side second of possible implementation, in the 5th kind of possible implementation, the acquisition pattern for the local code book W that the vector storage unit is used includes：For ULA gusts of plane very high frequency(VHF) radio wave antenna with equation below：

Satisfaction is found out in calculating in the span of the W and causes the V precoding vector in two-dimensional space, so that directional diagram value [, in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, j is imaginary unit, and S is angle of the emitter in coverage direction, the angular range of covering is being needed where angle on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book, d_eTo be the wavelength of signal to quadraturing.

With reference to one side implementation or one side the first possible implementation or one side second of possible implementation, in the 6th kind of possible implementation, the W that the vector storage unit is selected is as the two-dimentional precoding weighting matrix of local code book：

Wherein, j is imaginary unit, and Ν is the 1st row that the transmitting antenna number 1 of emitter is the matrix of generation, and Δ represents a parameter for precoding vector, and Δ is non-zero real.

It is described in the 7th kind of possible implementation with reference to the 6th kind of possible implementation of one side

W_v = -^W {:, _n )

Vector storage unit, for using equation below： ^^vV row precoding vectors are selected from the local code book W.

With reference to the 6th kind of possible implementation of one side, in the 8th kind of possible implementation, the vector storage unit selects the value of Δ described in the W to be the non-zero real less than 1.

The aspect of the embodiment of the present invention two provides a kind of data transmission method, including：

Information bit is obtained, Channel Coding and Modulation, the data after being modulated are carried out to described information bit；Data after modulation are mapped to the V spatial data layer of transmitted in parallel, V is more than or equal to 1;

V row precoding vectors W is selected from the local code book W_v；So that the V row precoding vectors W selected from the W_vMore than half energy of the directional diagram of formation are appeared in the angular range of non-omnidirectional；Precoding is carried out to being mapped to the data after the modulation of V layer using the V row precoding vector point Do of selection, is modulated to the data that precoding is obtained, and the data that adjustment is obtained are sent by V antenna.

With reference to the implementation of two aspects, in the first possible implementation, the method that V row precoding vectors are selected from the local code book W, including：

Alternate selection obtains V row in all row in the W；Or, select the corresponding row of maximum wave beam first in the W, remaining V -1 is listed in alternate selection in the remaining columns after being selected first in the W；Or, the row to be selected in the W are determined according to specified angle of coverage, then alternate selection obtains V row, or the corresponding row of the maximum wave beam of selection first in row to be selected in row to be selected, and remaining V -1 is listed in alternate selection in the remaining row to be selected after being selected first in the W.

With reference to the implementation of two aspects, in second of possible implementation, during the data by after modulation are mapped to the V spatial data layer of transmitted in parallel, in addition to： Layer mapping is done to i-th of data symbol d (i), the d (i) is reflected^XWhen, sign change is carried out, (' ') refers to i-th of data symbol in the Z data flow after layer mapping, meet following condition：

x^(/)(0 = d(vi + (/ + ) mod ν), 0 < / <ν -1 combines second of possible implementation of the implementation of two aspects or the first possible implementation of two aspects or two aspects, and in the third possible implementation, the local code book w's obtains

；The value of calculating [

+ Δ_{θ ]}In the range of and value exist ,+] and in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, it is that emitter is that antenna needs the angular range of covering on the direction of angle and place plane in angle He Fen Do of two institute's coverage directions with ^, V is the columns for being derived from pre-coding matrix, the W is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) and represent that the 1st row get V row from local code book,^dFen Do for pair and quadrature.

With reference to the implementation of two aspects or second of possible implementation of the first possible implementation of two aspects or two aspects, in the 4th kind of possible implementation, the local code book W's obtains with equation below：

In calculating in the span of the W

Find out satisfaction and cause the V precoding vector in two-dimensional space so that directional diagram value in ^, in the range of, and average gain vector in the range of the two dimension angular in space reaches prelisting during maximum

, N is the transmitting of emitter Antenna number；S and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle S, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book,^W) for the average gain vector of directional diagram, a is the guiding vector of emitter each antenna, W (：, 1) and represent that the 1st row get V row from local code book, d is the position vector of each corresponding bay of emitter of two-dimensional space.

With reference to the implementation of two aspects or second of possible implementation of the first possible implementation of two aspects or two aspects, in the 5th kind of possible implementation, the preparation method of the local code book W includes：For under the antenna configuration scene of ULA gusts of plane very high frequency(VHF) radio wave, with as follows

Satisfaction is found out in calculating in the span of the W and causes the V precoding vector in two-dimensional space, so that directional diagram value in the range of [], and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, j is imaginary unit, and ^ is angle of the emitter in coverage direction, the angular range of covering is being needed where angle S on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book, d_eTo be the wavelength of signal to quadraturing.

With reference to the implementation of two aspects or second of possible implementation of the first possible implementation of two aspects or two aspects, in the 6th kind of possible implementation, the W is as the precoding weighting matrix of local code book two dimension：

Wherein, j is imaginary unit, and Ν is that the transmitting antenna number 1 of emitter is that the 1st row Δ of the matrix of generation represents a parameter for precoding vector, and Δ is non-zero real. It is described to select V row precoding vectors to include from local code book W in the 7th kind of possible implementation with reference to the 6th kind of possible implementation of two aspects：

Using equation below：

W_v = -^W {:, _n )

^^vV row precoding vectors are selected from the local code book W.

With reference to the 6th kind of possible implementation of two aspects, in the 8th kind of possible implementation, the value of the Δ is the non-zero real less than 1.

As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：Data after modulation are mapped to the V spatial data layer of transmitted in parallel, more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from local code book W are appeared in the angular range of non-omnidirectional, point Do is selected using choosing and carries out precoding to being mapped to the data after the modulation of V layer, is sent after being modulated to the data that precoding is obtained by V antenna；This will enable the energy of emitter to focus on the angle specified, so as to improve

UE receives SNR.Brief description of the drawings

Technical scheme in order to illustrate the embodiments of the present invention more clearly, the accompanying drawing used required in being described below to embodiment, which makees cylinder, to be introduced, apparently, drawings in the following description are only some embodiments of the present invention, for one of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.

Figure la is application scenarios schematic diagram of the embodiment of the present invention；

Figure lb is application scenarios schematic diagram of the embodiment of the present invention；

Fig. 2 is beam gain direction schematic diagram of the embodiment of the present invention；

Fig. 3 is beam gain direction schematic diagram of the embodiment of the present invention；

Fig. 4 is angle schematic diagram of the embodiment of the present invention；

Fig. 5 is the block diagram representation that the embodiment of the present invention is performed；

Fig. 6 is present invention method schematic flow sheet；

Fig. 7 a are the gain direction schematic diagram after beam superposition of the embodiment of the present invention；

Fig. 7 b are the gain direction schematic diagram after beam superposition of the embodiment of the present invention；

Fig. 8 a are the gain direction schematic diagram after beam superposition of the embodiment of the present invention；

Fig. 8 b are the gain direction schematic diagram after beam superposition of the embodiment of the present invention； Fig. 9 a are the gain direction schematic diagram after beam superposition of the embodiment of the present invention；

Fig. 9 b are the gain direction schematic diagram after beam superposition of the embodiment of the present invention；

Figure 10 is apparatus structure schematic diagram of the embodiment of the present invention；

Figure 11 is apparatus structure schematic diagram of the embodiment of the present invention；

Figure 12 is apparatus structure schematic diagram of the embodiment of the present invention.Embodiment

In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, it is clear that described embodiment is only embodiment of the invention a part of, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

The prevailing scenario that scheme of the embodiment of the present invention is directed to is described as follows：Exemplified by using base station as emitter, it is that receiver is distributed in the building lower than base station to scheme la, and the square frame of the right and left is expressed as building, and base station is located at the higher building in the left side, receiver is located at the relatively low building in the right, and direction of arrow angle is useful orientation angle in Base Transmitter signal.Figure lb is that receiver be distributed in the building higher than base station, and the square frame of the right and left is expressed as building, and base station is located at the relatively low building in the left side, and receiver is positioned at the higher building in the right, and direction of arrow angle is useful orientation angle in Base Transmitter signal.

Figure la and figure lb is the 3D communication scenes studied at present, and UE can vertical distribution in high building on the right in vertical direction.In figure la, the height where UE is lower than the height of base station, the macrocell in existing network（UMa, Urban Macro, city macrocell）Deployment scenario be usually such application scenarios.In figure lb, the floor where UE is higher than base station, micro- station in existing network（UMi, Urban Micro, city Microcell）Or small station（Pico deployment scenario) is usually such application scenarios.

Although scheming the application scenarios in la and figure lb, exist always in the deployment of existing network, it is distributed at present.And if base station is mainly as the UE in upper figure la and figure lb to carry out communication service, then UE is distributed just in a relatively limited smaller scope with respect to the space angle of base station.Using omnidirectional's even power distribution scheme, then the problem of having power dissipation.

Such as under UMa scenes, the scope of angulation and the angle of direct north are between 90 degree to 126 degree in typical distribution in the rectilinear direction between UE and BS (Base Station base stations)；And under UMi scenes, then typically distribution is between 60 ~ 120 degree to this angle.I.e. their typical distribution is pressed from both sides Angle is about that in the very narrow scope between 36 ~ 60 degree, this is more much smaller than 360 degree of the space angle that omnidirectional in horizontal direction covers.

Code book can be used in the scheme that omnidirectional covers on horizontal direction is realized, it is specific as follows：Such as base station

1 0

During transmitting antenna number N=2, W is unit battle array, i.e.,：The 01 bases code book, every layer of upper only 1 antenna is in transmitting, and two antennas are launched in turn on different layers, the signal that now antenna on every layer is sent is the equal of omnidirectional, as shown in Fig. 2 during for transmitting antenna N=2, the beam gain directional diagram on each layer.2 as can be seen that use unit matrix when the scene covered for omnidirectional, N=2 from the graph, is optimal covering scheme.

In the prior art, during Base Transmitter antenna number N=4, above-mentioned W is unit battle array, specific as follows：Table 6.3.4.2.3-2, the code book launched on antenna port { 0,1,2,3 } is as shown in table 1 below：

Table 1

In table 1, W=/ -2w l ' vector is by base vector of ^ to take v=2,3 in the scheme of omnidirectional's covering in obtained matrix, horizontal direction to calculate by formula herein, value when 4.What is represented is that fluxion when code book index is 12 is 1 and is that the corresponding pre-coding matrix of the 1st row is taken out from W.It is then to represent that code book index is 13, that the 1st and 3 row are taken out from ^ is used for the pre-coding matrix of double fluid.

When such as code book index is 12, corresponding antenna spacing is the antenna radiation pattern of the ULA formation of half-wavelength as shown in figure 3, Fig. 3 show the scheme that omnidirectional covers in horizontal direction, when N=4 during v=4, code book index is v=4,4 layers of each beam gain directional diagram in 12.

From figures 2 and 3, it will be seen that the beam gain directional diagram on each layer obtained in the scheme that omnidirectional covers in horizontal direction, is directed to the different directions in space, and uniformly or than more uniform distribution on whole 360 degree of direction. But it can be seen that from the description of scene of the invention above, in new scene, under the scene covered in such as vertical direction, the covering of omnidirectional need not be carried out to signal, that is, if using precoding in the way of the scheme that omnidirectional in horizontal direction covers, the energy of obtained reception signal necessarily uniformly occurs on 360 degree of all directions in an uniform manner.For this application scenarios being previously mentioned to the embodiment of the present invention, those angular ranges that need not be covered, equivalent to the waste of energy.For example in the range of 180 to 360 degree, not come in handy family（Equivalent to the back side of antenna in vertical direction）, and in vertical direction, the back side of antenna, the gain of of antenna also very little itself.Therefore, in such a scenario, the precoding vector still covered using omnidirectional does the transmission of signal, it will bring the invalid of the antenna free degree to use, i.e. the loss of the free degree.Therefore, for similar above-mentioned scene, the embodiment of the present invention will be provided more effectively uses the scheme of antenna resources by precoding vector, to obtain the bigger antenna service efficiency and the free degree in particular coverage.

Before the progress embodiment of the present invention is further described, by taking the covering in vertical direction as an example, in embodiments of the present invention, angle schematic diagram is as shown in Figure 4, for the definition schematic diagram of antenna radiation pattern angle in vertical direction, the effective range of angle is in [0,180], and actual coverage is then relevant with scene.As shown in Figure 5, the block diagram performed for the embodiment of the present invention, information bit enters after channel encoding unit 501, successively through QAM modulating units 502, layer map unit 503, precoding arithmetic element 504, modulating unit 507 and radio frequency unit 508, finally launch from antenna；Therebetween, precoding arithmetic element 504 can receive precoding selecting unit 505 and precoding vector is selected from local code book W (506) according to the data from layer map unit 503；Precoding arithmetic element 504 performs precoding computing and uses the above-mentioned precoding vector received.Based on this execution block diagram, the embodiments of the invention provide following specific implementation.

The embodiments of the invention provide a kind of data transmission method, as shown in fig. 6, including：

601 :Information bit is obtained, Channel Coding and Modulation, the data after being modulated are carried out to above- mentioned information bit；

602:Data after modulation are mapped to the V spatial data layer of transmitted in parallel, V is more than or equal to 1;Further, during the above-mentioned data by after modulation are mapped to the V spatial data layer of transmitted in parallel, in addition to：Layer mapping is done to i-th of data symbol d (i), above-mentioned d (i) is reflected then, sign change is carried out, above-mentioned ^ (' ') refers to the after layer mapping¹I-th of data symbol in individual data flow, meets following condition： x^(l)( ) = d(vi + (/ + ) mod ν), 0 < / < ν - 1 603:V row precoding vectors are selected from local code book W so that selected from above-mentioned W More than half energy of the directional diagram of v row precoding vector formation are appeared in the angular range of non-omnidirectional；Alternatively, the embodiment of the present invention additionally provides the specific implementation that V row precoding vectors how are selected from above-mentioned local code book W, specific as follows：The above-mentioned method that V row precoding vectors are selected from local code book W, including：Alternate selection obtains V row in all row in above-mentioned W；Or, select the corresponding row of maximum wave beam first in above-mentioned W, remaining V -1 is listed in alternate selection in the remaining columns after being selected first in above-mentioned W；Or, the row to be selected in above-mentioned W are determined according to specified angle of coverage, then alternate selection obtains V row in row to be selected, or the corresponding row of maximum wave beam are selected first in row to be selected, alternatively, above-mentioned local code book W preparation method includes：With equation below：

；Calculate ^ value [., f (W) = d^ {G + Δ_{θ ]}In the range of and value exist, ^+] in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, ^ and ^ are that emitter is that antenna needs the angular range of covering on the direction of angle and place plane in angle He Fen Do of two institute's coverage directions, V is the columns for being derived from pre-coding matrix, above-mentioned W is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) and represent that the 1st row get V row from local code book,^dFen Do for pair and quadrature.

Alternatively, above-mentioned local code book W preparation method includes：With equation below：

Calculate in above-mentioned w span in f (W)=msix { G (W) } find out satisfaction cause in two-dimensional space V precoding vector so that directional diagram value [., in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, a is a (k)=e^jl7M, k=, ' ", N-, Ν is the transmitting of emitter Antenna number；S and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle S, V is the columns for being derived from pre-coding matrix, and above-mentioned W is the two-dimentional precoding weighting matrix of local code book,<It is ^) the average gain vector of directional diagram, W (：, 1) and represent that the 1st row get V row from local code book, a is the guiding vector of each antenna of emitter, and d is the position vector of each corresponding bay of emitter of two-dimensional space.

Alternatively, above-mentioned local code book W preparation method includes：Configured for ULA gusts of day of plane very high frequency(VHF) radio wave under scene, with equation below：

；Satisfaction is found out in calculating in above-mentioned W span and causes the ν precoding vector in two-dimensional space, so that directional diagram value [, in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, j is imaginary unit, S is angle of the emitter in coverage direction, the angular range of covering is being needed where angle on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, above-mentioned W is the two-dimentional precoding weighting matrix of local code book, and ^ is that, to quadraturing, A is the wavelength of signal.

Alternatively, above-mentioned W is as the two-dimentional precoding weighting matrix of local code book：

Wherein, j is imaginary unit, and Ν is that the transmitting antenna number 1 of emitter is that the 1st row Δ of the matrix of generation represents a parameter for precoding vector, and Δ is non-zero real.

Preferably, the value of above-mentioned Δ is the non-zero real less than 1.

Alternatively, it is above-mentioned to select V row precoding vectors to include from local code book W： W_v =^W(:,y_n)

Using equation below：V row precoding vectors are selected from above-mentioned local code book W.

604:Precoding is carried out to being mapped to the data after the modulation of V layer using the V row precoding vector point Do of selection, is modulated to the data that precoding is obtained, and the data that adjustment is obtained are sent by V antenna.

The embodiment of the present invention, data after modulation are mapped to the V spatial data layer of transmitted in parallel, more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from local code book W are appeared in the angular range of non-omnidirectional, precoding is carried out to being mapped to the data after the modulation of V layer using ^ points of Do of selection, is sent after being modulated to the data that precoding is obtained by V antenna；This will enable the energy of emitter to focus on the angle specified, so that improving UE receives SNR.

Following examples are by the implementation procedure with reference to shown in Fig. 5, and the specific implementation to each several part of the embodiment of the present invention is illustrated.It is main to layer map unit 503 below, precoding arithmetic element 504, precoding selecting unit 505 and local code book W (506), with reference to the block diagram in above-mentioned Fig. 5; to divide Do to describe layer map unit 503, precoding arithmetic element 504, precoding selecting unit 505 and local code book W (506) implementation.

Layer map unit 503 is specific as follows：

First, layer mapping during spatial reuse

In order to realize grade of the data in interlayer to covering, it is necessary to by QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation）I-th of data symbol d (i) after modulation does layer mapping.

During as multiplexing, need d (i) being mapped to multiple layers, and in order to reach communication efficiency evenly, need to do the intertexture of interlayer, that is d (i) reflect to when, the change of distinct symbols can be done, (0 refers to i-th of symbol in the 1st data flow after layer mapping to ^ here.

A kind of a kind of specific embodiment for realizing the mapping method that layer mapping and interlayer interweave is as follows：

χ^{1) ( = d(vi + (/ + mod v), 0≤ /≤ v _ 1

It is the maximum number of plies such as to have 4 layers, i.e. v=4, V

Have as i=4v：

x^m(i) = d^m(4i)

x¹⁾(i) = d^m(4i + l)

x⁽³⁾( = ^⁽⁰⁾(4 + 3) . Have as i=4v+l：

x^m(i) = d^m(4i + \)

x⁽¹⁾(i) = d⁽⁰⁾(4i + 2)

x⁽²⁾(i) = d⁽⁰⁾(4i + 3)

(³⁾( = ⁽⁰⁾(4 + 0) .

Have as i=4v+2：

x⁽⁰⁾(i) = d⁽⁰⁾(4i + 2)

x⁽¹⁾(i) = d^m(4i + 3)

x⁽²⁾(i) = d^m(4i + 0)

Have as i=4v+3：

x^m(i) = d^m(4i + 3)

x⁽¹⁾(i) = d^m(4i + 0)

x⁽²⁾(i) = d^m(4i + \)

x⁽³⁾( ) ⁽⁰⁾(4 + 2)。

Above-mentioned effect is the equal of different symbols to be mapped on different layers, except the above embodiments sunset is foretold, can also there is the method that similar other interlayers interweave, here not --- enumerate.Above-mentioned method is to penetrate the data symbol after an encoding block modulation to reflect on V layer, and the data symbol after can also multiple codeword coding blocks be modulated is reflected on rear V layer.Here just no longer enumerate.

Above-mentioned method is suitable for Open-Loop Spatial Multiplexing with being suitable for spatial reuse , Te Do.Can be used for based on have code book can also be no code book reference signal transmission.As the method for Open-Loop Spatial Multiplexing, no matter whether reference signal has code book, this method need not all be fed back.Except that, the equivalent channel that UE receiver is seen is different.

2nd, layer mapping during space diversity

The method of the embodiment of the present invention, can be also used for layer mapping during space diversity.I.e. data are done on one or more layers and launched, but the content sent on different layers is identical.Now the method Te Do of the embodiment of the present invention are applied to the broadcast channel that emitter only needs to covering part spatial dimension, such as the PBCH channels in LTE systems, for Transmission system message SIB PDSCH channels, CSS in ePDCCH etc., and other broadcast type business（Broadcast or multicast or multicast）Or the transmission of public message.

The mapping mode of data to layer is as follows： x^(v-^l i) = d

That is, same data are mapped on V different layers.

The method of this space diversity, the UE equivalent to each diverse location data into space is transmitted.

Local code book W (506), the unit, which is realized, generates local code book W, specific as follows：

In the generation implementation process of local code book W (506), we first provide some general generation methods, then in conjunction with specific antenna number, provide the embodiment of some lists for the scene of above-mentioned non-omnidirectional antenna covering.

The method of the embodiment of the present invention is that generation is with the weight coefficient for pointing to the precoding in the range of certain spatial domain, so that the precoding weight coefficient of generation obtains the energy value of maximum in the angular range for needing to cover.

One function is as follows：

F (W)=max { G (W) } formula（1) He Fen Do are that transmitter antenna needs the angular range of covering on the direction of angle and place plane in, V is the columns for being derived from pre-coding matrix, and above-mentioned W is two-dimentional precoding weighting matrix, and angle and the angle for emitter in two institute's coverage directions are represented.Formula（1) expression formula is meant that：Satisfaction is found out in the span of all presence of above-mentioned W and causes V precoding vector in three dimensions so that directional diagram in S in ^,^θο ⁺, and [reaching maximum in the range of A, the two dimension angular in space.

Each antenna of a emitters guiding vector, its general expression formula is：Wherein Φ is the DOA vectors of two-dimensional space, and ^ is the position vector of each corresponding bay of emitter of two-dimensional space.J is imaginary unit, is the wavelength of signal.

Formula（1) meaning is, the average gain vector that calculating can make within the specified range reaches pre-coding matrix during maximum.That is the design method of the embodiment of the present invention, exactly with meeting formula（1) expression formula is come Precoding is done to the data on antenna to sending, data are transmitted into the area of space specified up with maximum spatial gain to realize.

Further, exemplified by the ULA battle arrays of covering below by emitter on an antenna direction, to provide pre-coding matrix more specifically implementation method.Formula（2) expression formula is meant that：Found out in the span of all presence of above-mentioned W satisfaction cause in two-dimensional space V precoding vector so that directional diagram [^θο ⁺Maximum is reached in the range of ο, the two dimension angular in space.

Wherein_aFor： — = ... —_NFor the transmitting antenna number of emitter, write as the form of vector, be：

1

】2πάλ— sin(i?)

e

A e use following Form generation as a kind of preferably embodiment, pre-coding matrix:

w(l,l) w(l,2) w l,v)

w(2,l) w(2,2) w(2,v)

W (N, l) w (N, 2) w (N, v) wherein H, Z) is unit range value, that is IV (fc, /)=') a kind of further method can be expressed as w (k)=e, the benefit so set is that the power distribution on each transmitting antenna can be used identical, so as to improve PA (poweramplifier, power amplifier on antenna each array）Efficiency.

To different number of plies v and angular range.With calculating above formula（3) extreme value, you can with the expression formula for the pre-coding matrix W for obtaining meeting design requirement.Formula（3) expression formula is meant that：For under the antenna configuration scene of ULA gusts of plane, in the span of all presence of above-mentioned W in find out satisfaction and cause the V precoding vector in two-dimensional space so that directional diagram S [,^θο ⁺ _θ], maximum is reached in the range of the two dimension angular in space.In the embodiment of the present invention, the data of multiple streams are uniformly mapped to specific area of space as far as possible in order to realize, also, keep the characteristic of unit amplitude, and the further optimization complexity of cylinderization design, specific example below designs by following method：^Δ' ^ ；

1 1

-j2^(jV-l)A

1 N

-]2π(Ν-ϊ)Α -ί2π(Ν-\)(Ν-\)Α

1 e N N

(4b) wherein, 1 for generation the 1st of matrix row, △ represents the real number of the Shu non-zero for precoding vector, behind can do more detailed introduction with reference to example. In actual use, when the fluxion of data is V, that is, from formula（The bad ij of V are taken out in 4b), its expression formula is：

^^v (4c)

Expression formula（It is a vector here, it is 1 equivalent to v row are taken out from above-mentioned W matrixes in 4c):One of the V numbers taken out within N indicates vector, during such as N=4, during v=3, ^¹,²,³], or v=[²,³,⁴].Pre-coding matrix ^ to there is V layers, is also denoted as：

W =-=^(:^) W(:,v₂) ■■■ W(:,v )1

^ ；Wherein V is the number of plies.

Specific antenna number and the number of plies are tied below, provide the W of precoding array generation method.The preferably W matrixes under each stream and antenna number can be provided below.

1「1 1 —

w = - ._Δ

If W=2, support that the W of 2 streams is as follows：^{2 e} 」。

Wherein, Fig. 7 a show the embodiment of the present invention when the gain pattern behind Ν=2, ν=2, Δ=4/5,2 beam superposition；Fig. 7 b show the embodiment of the present invention when Ν=2, ν=2, the gain pattern after the beam superposition of Δ=9/10,2.If W=4, Fig. 8 a, which show the embodiment of the present invention, works as gain pattern after Ν=4, Δ=3/5, v=4, W, 4 beam superpositions；Fig. 8 b show the embodiment of the present invention when Ν=4, Δ=3/5, ν=4, W, the respective gain pattern of 4 wave beams.From FIG. 7 above a 7b 8a 8b can be seen that the method that the embodiment of the present invention is provided, in the range of 0 ~ 180 degree, the covering that signal energy is more concentrated can be provided, i.e., in the range of 0 ~ 180 degree, the gain of antenna radiation pattern is bigger.

If N=8, work as the directional diagram after Ν=8, Δ=6/11, v=8, W, 8 beam superpositions as shown in Figure 8 a for the embodiment of the present invention；It is Ν=8 of the embodiment of the present invention, Δ=6/11, v=8, W, the respective gain pattern of 8 wave beams as shown in Figure 8 b.

As can be seen that for transmitter antenna number N=2,4,8 situation, the Δ value properly selected, the gain pattern that can form emitter more focuses on the interval of 0 ~ 180 degree from the embodiment of the present invention.Also, the gain pattern of each Wave beam forming is also to focus more between 0 ~ 180 degree.It can thus be seen that the whether gain pattern of each Wave beam forming, or the gain pattern synthesized.Yield value all prior arts between 0-180 degree will be big.So as to reach the purpose of signal qualitys of the improvement UE in the range of the angle of coverage of 0 ~ 180 degree.

It may be noted that emitter, such as base station are before communicating, it is necessary to first pass through the electrical tilt of array element level（Updip Angle or angle of declination）Or the mechanical tilt of antenna array（Top rade or angle of declination）The regional extent spatially for making the signal of front be covered against needs.The angle of above-mentioned emulation is the equal of angle of the transmission signal relative to transmitter antenna front.Therefore in this sense, when coverage is by limited time, the gain pattern in the range of 0 ~ 180 degree is enough.When needing to cover more small range, it is only necessary to the value of adjusting parameter Δ.

Precoding selecting unit 505 is specific as follows：

In embodiments of the present invention, precoding selecting unit 505 can at random be selected in local code book, and the vector of main covering, other vectorial online choosings can also be chosen every time.In embodiments of the present invention, when spatial reuse, the method for precoding selection, the method for being selection ^ can be as follows：

W_v =-=W(:,y_n)

Vv ；

I.e.：How V row are selected from above-mentioned W.There can be two methods：A kind of method is alternately selected by certain rule in all N number of row.Another method is to choose the corresponding column vector of larger wave beam every time, and others are listed in whole code book and alternately selected.

4 it is blunt set N=8, v=2, alternately a kind of embodiment of the method for choosing is as follows：

Vn= {1,2}, Vn= {3,4}, Vn= {5, 6}, Vn= {7, 8}。

The embodiment of another method choice is as follows：

Vn= {8, 1}, Vn= {8,2}, Vn= {8, 3}, Vn= {8,4}, Vn= {8, 5}, Vn= {8, 6}, Vn = {8, 7};

In figure 9b, it can be seen that the corresponding gain pattern of wave beam 8 can cover the maximum scope near 90 degree, so the selection of each wave beam has all taken this vector, other column vectors are then alternately selected inside this.

Still an alternative is that, selected by the smaller scope of covering, if the scope of covering is 30 ~ 150 degree of space angle, in figure 9b, the lobe of qualified vectorial directed quantity { 5,6,7,8 } and vector 8 is most wide.So, it can be selected with this 4 vectors by both above method.

Whether space diversity, or spatial reuse are sent out, when the number of plies used is less than N, when precoding selection is done, above-mentioned different Vn can do alternate selection in the data for a transmission block.

The d (i) of L symbol is obtained after the data QAM modulation of such as one encoding block, this L symbol is divided into M small data block Bl, the length of for example each data block of B2, BM. comprises at least the symbolic number of corresponding symbolic number, i.e. primary space multi-antenna transmission on V layers.At that time during spatial reuse, each data block Length be v modulation symbol d;Then it is a modulation symbol d when for hair diversity.Then it is this M small data blocks, the pre-coding matrix ^ of alternate selection above.

^W- selection, can by Vn above choosing method, alternately chosen in local code book W.That is, different Bi can be sent from different ^.

Precoding arithmetic element 504 is specific as follows：

Precoding arithmetic operation is that the algorithm 4 that can be selected is blunt more, and its corresponding operation is that can use one kind in following 2 kinds of methods.Wherein in method 2^β(' ') is the operation of other matrixes before data,^β(' ') can be the equivalent matrix obtained after a matrix or multiple matrix operations.

Method 1:

Method 2:

Wherein, W is then the matrix that precoding selecting unit 505 is exported.

The embodiment of the present invention, by under non-omnidirectional's covering scene, the design of prelist code generating method and application method can provide the energy of bigger transmission signal, so as to more effectively make use of the free degree of antenna for the UE under non-omnidirectional's covering scene.The UE under this scene is set to result in the energy of bigger reception signal, so as to improve UE reception SNR.

The embodiment of the present invention additionally provides a kind of data sending device, is used as emitter, as shown in Figure 10, including：

Coded modulation unit 1001, Channel Coding and Modulation, the data after being modulated are carried out for obtaining information bit, and to above- mentioned information bit；

Map unit 1002, for above-mentioned coded modulation unit 1001 to be modulated after data be mapped to transmitted in parallel V spatial data layer, V be more than or equal to 1;Vector storage unit 1003, for selecting V row precoding vectors ^ from local code book W so that more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from above-mentioned W appear in non-complete To angular range in；

Precoding unit 1004, the V row precoding vector point Do for being selected using above-mentioned vector storage unit 1003 carries out precoding to being mapped to the data after the modulation of V layer；

Modulating unit 1005, for being modulated in the data obtained to the above-mentioned precoding of precoding unit 1004, and the data that adjustment is obtained are sent by V antenna.

The embodiment of the present invention, V spatial data layer will be adjusted, more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from local code book W are appeared in the angular range of non-omnidirectional, precoding is carried out to being mapped to the data after the modulation of V layer using ^ points of Do of selection, is sent after being modulated to the data that precoding is obtained by V antenna；This will enable the energy of emitter to focus on the angle specified, so that improving UE receives SNR.Alternatively, the method that above-mentioned vector storage unit 1003 selects V row precoding vectors ^ from local code book W, including：V row are obtained for alternate selection in all row in above-mentioned W；Or, select the corresponding row of maximum wave beam first in above-mentioned W, remaining V -1 is listed in alternate selection in the remaining columns after being selected first in above-mentioned W；Or, the row to be selected in above-mentioned W are determined according to specified angle of coverage, then alternate selection obtains V row in row to be selected, or selects maximum wave beam corresponding further first in row to be selected, as shown in figure 11, said apparatus, in addition to：

Sign reversing unit 1101, during V spatial data layer for the data after modulation to be mapped to transmitted in parallel in above-mentioned map unit 1002, layer mapping is done to i-th of data symbol d (i), above-mentioned d (i) is reflected《When, sign change is carried out, above-mentioned (' ') refers to i-th of data symbol in the Z data flow after layer mapping, meet following condition： x^(l)( ) = d(vi + (/ + ) mod ν), 0 < / <ν -1 alternatively, above-mentioned vectorial il

With:Mouthful

；The value of calculating [ + Δ_θ]In the range of and value exist, ^+] in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, S and ^ are that emitter is that antenna needs the angular range of covering on the direction of angle S and place plane in angle He Fen Do of two institute's coverage directions, V is the columns for being derived from pre-coding matrix, above-mentioned W is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) and represent that the 1st row get V row from local code book,^d^ Fen Do are to S and quadratured.

Alternatively, above-mentioned vectorial il

With:Formula under mouthful：

f(W) = max{G(W)}

Satisfaction is found out in calculating in above-mentioned w span and causes the V precoding vector in two-dimensional space, so that directional diagram value [, in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein,_aFor a^)=e, the Υ of k bis-, Ν _ Υ,_ΝFor the transmitting antenna number of emitter；^ and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle ^, V is the columns for being derived from pre-coding matrix, and above-mentioned W is the two-dimentional precoding weighting matrix of local code book,^W) for the average gain vector of directional diagram, a is the guiding vector of emitter each antenna, W (：, 1) and represent that the 1st row get V row from local code book, d is the position vector of each corresponding bay of emitter of two-dimensional space.For under the antenna configuration scene of ULA gusts of face very high frequency(VHF) radio wave, with equation below：

；Calculate in above-mentioned W span in find out satisfaction cause in two-dimensional space ν precoding vector so that directional diagram S value [,^+ΔIn the range of, and the average increasing in the range of the two dimension angular in space Beneficial vector reaches pre-coding matrix during maximum；Wherein, j is imaginary unit, ^ is angle of the emitter in coverage direction, the angular range of covering is being needed where angle on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, above-mentioned w is the two-dimentional precoding weighting matrix of local code book, for quadraturing, A is the wavelength of signal.

Alternatively, the above-mentioned W of the above-mentioned selection of vector storage unit 1003 is as the two-dimentional precoding weighting matrix of local code book：

" wherein, j is imaginary unit, and Ν is the 1st row that the transmitting antenna number 1 of emitter is the matrix of generation, and Δ represents a parameter for precoding vector, and Δ is non-zero real.

W_v = -^W{:, _n) alternatively, above-mentioned vector storage unit 1003, for using equation below：V row precoding vectors are selected from above-mentioned local code book W.

Alternatively, above-mentioned vector storage unit 1003 selects the value of above-mentioned Δ in above-mentioned W to be the non-zero real less than 1.

The embodiment of the present invention additionally provides another data sending device, as shown in figure 12, including：Receiver 1201, transmitter 1202, processor 1203 and memory 1204, wherein above-mentioned processor 1203, for obtaining information bit, Channel Coding and Modulation, the data after being modulated are carried out to above- mentioned information bit；Data after modulation are mapped to the V spatial data layer of transmitted in parallel, V is more than or equal to 1;V row precoding vectors ^ is selected from local code book W so that more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from above-mentioned W are appeared in the angular range of non-omnidirectional；Precoding is carried out to being mapped to the data after the modulation of V layer using the V row precoding vector point Do of selection, is modulated to the data that precoding is obtained, and the data that adjustment is obtained are sent by V antenna.

The embodiment of the present invention, the data after modulation is mapped to the V spatial data layer of transmitted in parallel, from this More than half energy of the directional diagram for the V row precoding vectors ^ formation selected in ground code book W are appeared in the angular range of non-omnidirectional, precoding is carried out to being mapped to the data after the modulation of V layer using ^ points of Do of selection, is sent after being modulated to the data that precoding is obtained by V antenna；This will enable the energy of emitter to focus on the angle specified, so that improving UE receives SNR.

Further, above-mentioned processor 1203, during being additionally operable to the V spatial data layer that the above-mentioned data by after modulation are mapped to transmitted in parallel, does layer mapping, by above-mentioned d to i-th of data symbol d (i)

(i) reflect and (when 0, carry out sign change, above-mentioned W refers to i-th of data symbol in the Z data flow after layer mapping, meets following condition：

x^(l)( ) = d(vi + (/ + ) mod ν),0</<Alternatively, the embodiment of the present invention additionally provides the specific implementation that V row precoding vectors how are selected from above-mentioned local code book w to ν -1, specific as follows：The method that above-mentioned processor 1203 selects V row precoding vectors ^ from local code book W, including：Alternate selection obtains the bad ij of V in all row in above-mentioned W;Or, select the corresponding row of maximum wave beam first in above-mentioned W, remaining v- 1 is listed in alternate selection in the remaining columns after being selected first in above-mentioned W；Or, the row to be selected in above-mentioned W are determined according to specified angle of coverage, then alternate selection obtains V row, or the corresponding row of the maximum wave beam of selection first, remaining V- 1 in row to be selected in row to be selected

；The value of calculating is in [+Δ_θ]In the range of and value exist, ^+] in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, ^ and ^ are that emitter is that antenna needs the angular range of covering on the direction of angle and place plane in angle He Fen Do of two institute's coverage directions, V is the columns for being derived from pre-coding matrix, above-mentioned W is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) and represent that the 1st row get V row from local code book,^dFen Do for pair and quadrature.

Alternatively, above-mentioned processor 1203, for equation below：

f (W) = msix {G(W)}

Satisfaction is found out in calculating in above-mentioned w span and causes the V precoding vector in two-dimensional space so that directional diagram exists in S value

+] in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein,_aFor） = ' _V— Shang, N are the transmitting antenna number of emitter；^ and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle ^, V is the columns for being derived from pre-coding matrix, and above-mentioned W is the two-dimentional precoding weighting matrix of local code book,<It is ^) the average gain vector of directional diagram, W (：, 1) and represent that the 1st row get V row from local code book, a is the guiding vector of each antenna of emitter, and d is the position vector of each corresponding bay of emitter of two-dimensional space.

Alternatively, above-mentioned processor 1203, for the antenna configuration for ULA gusts of plane very high frequency(VHF) radio wave with following public：

；Satisfaction is found out in calculating in above-mentioned W span and causes the ν precoding vector in two-dimensional space, so that directional diagram value [, in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, j is imaginary unit, ^ is angle of the emitter in coverage direction, the angular range of covering is being needed where angle on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, above-mentioned W is the two-dimentional precoding weighting matrix of local code book, for quadraturing, A is the wavelength of signal.

Alternatively, the above-mentioned W of the above-mentioned acquisition of processor 1203 is as the two-dimentional precoding weighting matrix of local code book：

Wherein, j is imaginary unit, and Ν is the 1st row that the transmitting antenna number 1 of emitter is the matrix of generation,

△ represents a parameter for precoding vector, and Δ is non-zero real.

Alternatively, the value of above-mentioned Δ is the non-zero real less than 1 in the above-mentioned W that above-mentioned processor 1203 is obtained.

Alternatively, above-mentioned processor 1203, for selecting V row precoding vector bags W from local code book W_v = -^W {:, _n )

Include：Using equation below：V row precoding vectors are selected from above-mentioned local code book W.

It is worth noting that, said apparatus is simply divided according to function logic, but above-mentioned division is not limited to, as long as corresponding function can be realized；In addition, the specific name of each functional unit is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.

In addition, one of ordinary skill in the art will appreciate that realizing that all or part of step in above-mentioned each method embodiment can be by program to instruct the hardware of correlation to complete, corresponding program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read-only storage, disk or CD etc..

It these are only the present invention preferably embodiment; but protection scope of the present invention is not limited thereto; any one skilled in the art is in the technical scope that the embodiment of the present invention is disclosed; the change or replacement that can be readily occurred in, should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims

Claim

1st, a kind of data sending device, it is characterised in that including：

Coded modulation unit, Channel Coding and Modulation, the data after being modulated are carried out for obtaining information bit, and to described information bit；

Map unit, the V spatial data layer for the data after coded modulation unit modulation to be mapped to transmitted in parallel, V is more than or equal to 1;

Vector storage unit, for selecting V row precoding vectors W from local code book W_vSo that more than half energy of the directional diagram for the V row precoding vectors ^ formation selected from the W are appeared in the angular range of non-omnidirectional；

Precoding unit, the V row precoding vector point Do for being selected using the vector storage unit carries out precoding to being mapped to the data after the modulation of V layer；

Modulating unit, for being modulated in the data obtained to the precoding unit precoding, and the data that adjustment is obtained are sent by V antenna.

2nd, device according to claim 1, it is characterised in that the method that the vector storage unit selects V row precoding vectors ^ from local code book W, including：Alternate selection obtains V row in all row in the W；Or, select the corresponding row of maximum wave beam first in the W, remaining V -1 is listed in alternate selection in the remaining columns after being selected first in the W；Or, the row to be selected in the W are determined according to specified angle of coverage, then alternate selection obtains V row, or the corresponding row of the maximum wave beam of selection first in row to be selected in row to be selected, and remaining V -1 is listed in alternate selection in the remaining row to be selected after being selected first in the W.

3rd, device according to claim 1, it is characterised in that also include：

Sign reversing unit, during V spatial data layer for the data after modulation to be mapped to transmitted in parallel in the map unit, layer mapping is done to i-th of data symbol d (i), the d (i) is reflected then, carry out sign change, i-th of data symbol in the Z data flow referred to after layer mapping, meets following condition： x^(l) ( ) = d(vi + (/ + ) mod ν), 0 < / < ν - 1

4th, according to claims 1 to 3 any one described device, it is characterised in that

The acquisition pattern for the local code book W that the vector storage unit is used includes：With equation below：

Ten values calculated are in ^, f (W)=d^ { G+Δ_{θ ]}In the range of and value exist, ^+] in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, S and ^ are that emitter is that antenna needs the angular range of covering on the direction of angle S and place plane in angle He Fen Do of two institute's coverage directions, V is the columns for being derived from pre-coding matrix, the W is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) and represent that the 1st row get V row from local code book,^d^ Fen Do for pair and quadrature.

5th, according to claims 1 to 3 any one described device, it is characterised in that the acquisition pattern for the local code book W that the vector storage unit is used includes：With equation below：

Calculate in the span of the w in f (W)=max { G (W) } find out satisfaction cause in two-dimensional space V precoding vector so that directional diagram value [., in the range of, and average gain vector in the range of the two dimension angular in space reaches prelisting during maximum

₌ ^2πάλ-^ι (1-\)-ύη(θ) ^ ₌ j

Code matrix；Wherein,_aFor "=e N-N be emitter transmitting antenna number；S and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle S, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book,^W) for the average gain vector of directional diagram, a is the guiding vector of emitter each antenna, W (：, 1) and represent that the 1st row get V row from local code book, d is the position vector of each corresponding bay of emitter of two-dimensional space.

6th, according to claims 1 to 3 any one described device, it is characterised in that the acquisition pattern for the local code book W that the vector storage unit is used includes：For under the antenna configuration scene of ULA gusts of plane very high frequency(VHF) radio wave, with equation below：；Satisfaction is found out in calculating in the span of the W and causes the V precoding vector in two-dimensional space, so that directional diagram value [, in the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, j is imaginary unit, and ^ is angle of the emitter in coverage direction, the angular range of covering is being needed where angle on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book, d_eTo be the wavelength of signal to quadraturing.

7th, according to claims 1 to 3 any one described device, it is characterised in that

The W of vector storage unit selection is as the two-dimentional precoding weighting matrix of local code book：

Wherein, j is imaginary unit, and Ν is that the transmitting antenna number 1 of emitter is that the 1st row Δ of the matrix of generation represents a parameter for precoding vector, and Δ is non-zero real.

8th, device according to claim 7, its feature is in the vector storage unit, for using equation below: From the local code book

V row precoding vectors are selected in W.

9th, device according to claim 7, it is characterised in that

The vector storage unit selects the value of Δ described in the W to be the non-zero real less than 1.

10th, a kind of data transmission method, it is characterised in that including：

Information bit is obtained, Channel Coding and Modulation, the data after being modulated are carried out to described information bit;Data after modulation are mapped to the V spatial data layer of transmitted in parallel, V is more than or equal to 1; V row precoding vectors W is selected from the local code book W_v；So that selected from the W

V row precoding vectors W_vMore than half energy of the directional diagram of formation are appeared in the angular range of non-omnidirectional；Precoding is carried out to being mapped to the data after the modulation of V layer using the V row precoding vector point Do of selection, is modulated to the data that precoding is obtained, and the data that adjustment is obtained are sent by V antenna.

11st, method according to claim 10, it is characterised in that the method that V row precoding vectors are selected from the local code book W, including：

Alternate selection obtains V row in all row in the W；Or, select the corresponding row of maximum wave beam first in the W, remaining V -1 is listed in alternate selection in the remaining columns after being selected first in the W；Or, the row to be selected in the W are determined according to specified angle of coverage, then alternate selection obtains V row, or the corresponding row of the maximum wave beam of selection first in row to be selected in row to be selected, and remaining V -1 is listed in alternate selection in the remaining row to be selected after being selected first in the W.

12nd, method according to claim 10, it is characterised in that during the data by after modulation are mapped to the V spatial data layer of transmitted in parallel, in addition to：

Layer mapping is done to i-th of data symbol d (i), the d (i) is reflected then, i-th of data symbol in sign change, the Z data flow referred to after layer mapping is carried out, meets following condition:

χ^{(ί )} ( ) = d(vi + (/ + i) mod ν), 0 < / < ν - 1

13rd, according to claim 10 to 12 any one methods described, it is characterised in that the local code book w

；The value of calculating [

+ Δ_{θ ]}In the range of and value exist ,+] and in the range of, can make directional diagram average gain vector reach maximum pre-coding matrix；Wherein, ^ and ^ are that emitter is that antenna needs the angular range of covering on the direction of angle and place plane in angle He Fen Do of two institute's coverage directions, V is the columns for being derived from pre-coding matrix, the w is the two-dimentional precoding weighting matrix of local code book, for directional diagram average gain vector, a be transmitter antenna guiding vector, W (：, 1) represent from local code book In the 1st row get v row,^dFen Do for pair and quadrature.

14th, according to claim 10 to 12 any one methods described, it is characterised in that the preparation method of the local code book W includes：With equation below：

F (W)=max { G (W) }, which finds out to meet, in calculating in the span of the w causes the V precoding vector in two-dimensional space, so that directional diagram value [, in the range of, and average gain vector in the range of the two dimension angular in space reaches prelisting during maximum

ϋ¹ ^- l).sin(6») = ]_ . . . N _ \

Code matrix；Wherein,_aFor） = e , /c = '_V— Shang, N are the transmitting antenna number of emitter；S and ^ is angle of the emitter in two institute's coverage directions, and being antenna is needing the angular range of covering on the direction of plane where angle S, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book,^W) for the average gain vector of directional diagram, a is the guiding vector of emitter each antenna, W (：, 1) and represent that the 1st row get V row from local code book, d is the position vector of each corresponding bay of emitter of two-dimensional space.

15th, according to claim 10 to 12 any one methods described, it is characterised in that the preparation method of the local code book W includes：For under the antenna configuration scene of ULA gusts of plane very high frequency(VHF) radio wave, with:Formula under mouthful：

Calculate in the span of the W in find out satisfaction cause in two-dimensional space V precoding vector so that directional diagram S value [,^{+ Δ}In the range of, and the pre-coding matrix of average gain vector in the range of the two dimension angular in space when reaching maximum；Wherein, j is imaginary unit, and ^ is angle of the emitter in coverage direction, the angular range of covering is being needed where angle S on the direction of plane for antenna, V is the columns for being derived from pre-coding matrix, and the W is the two-dimentional precoding weighting matrix of local code book, d_eFor to quadraturing, A is the wavelength of signal.

16th, according to claim 10 to 12 any one methods described, it is characterised in that the W makees For this

Wherein, j is imaginary unit, and Ν is the 1st row that the transmitting antenna number 1 of emitter is the matrix of generation, and △ represents a parameter for precoding vector, and Δ is non-zero real.

17th, according to claim 16 methods described, it is characterised in that described to select V row precoding vectors to include from local code book W：

Using equation below：

W_v =-^W{:, _n)

V selects v row precoding vectors from the local code book W.

18th, according to claim 16 methods described, it is characterised in that the value of the Δ is the non-zero real less than 1.